Add a Card Search tab and fix horizontal-card (Battle/Plane) preview orientation

Card Search browses the whole downloaded card universe (not just owned
cards), reusing the Library tab's filter/group/sort/list/tiles UI; results
show ownership and offer quick "own" and "add to deck" actions.

Battles, Planes, and Phenomena store their Scryfall image portrait-shaped
with the content itself rotated, so hover/click previews now detect this
(a new `horizontal` flag threaded through ingest and every card query, with
graceful fallback for a reference.db built before the column existed) and
rotate the image back into place. Single-faced and non-DFC cases are
verified fixed; a double-faced Battle's front face still needs another pass.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/api.ts

@@ -10,6 +10,10 @@ export interface CardRef {
   colors: number; // WUBRG bitmask
   color_identity: number; // WUBRG bitmask
   type_line: string;
+  // Printed/displayed sideways (Battles, Planes, Phenomena). The stored
+  // image itself is portrait-shaped with the content rotated, so viewers
+  // must rotate it 90° to display right-side up.
+  horizontal: boolean;
   image_uri: string; // Scryfall "normal" image URL, or "" if unavailable
   back_image_uri: string; // back face for transform/MDFC/reversible cards, else ""
   produced_mana: number; // WUBRG bitmask of mana this card can tap for
@@ -177,8 +181,11 @@ export const api = {
 
   searchLibrary: (filter: LibraryFilter) =>
     invoke<LibraryCard[]>("search_library", { filter }),
+  searchReference: (filter: LibraryFilter, limit: number) =>
+    invoke<LibraryCard[]>("search_reference", { filter, limit }),
   getLibraryStats: () => invoke<LibraryStats>("get_library_stats"),
   getLibraryFacets: () => invoke<LibraryFacets>("get_library_facets"),
+  getReferenceFacets: () => invoke<LibraryFacets>("get_reference_facets"),
 
   listDecks: () => invoke<Deck[]>("list_decks"),
   createDeck: (name: string, commanderOracleId: string | null) =>